Automation library · Data collection

Conversing with OpenAI and Postgres

Started by someone opening a chat with it, and works across Postgres. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 25 steps, 1 branch: large, and worth reading before you trust it with anything live.

LargeCalls a model: OpenAIRetrieval

Download free
25 stepsLarge: read it before trusting it with anything live
1Branch: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 2Model 6Logic 10Service 7

The steps in the order they run, from what starts it.

  1. 1Window Buffer MemoryMemory Buffer WindowModel
  2. 2Chat TriggerChat triggerStarts it
  3. 3When clicking "Test workflow"Manual triggerStarts it
  4. 4Structured Output ParserOutput Parser StructuredModel
  5. 5deepseek-chatLm Chat Open AiModel
  6. 6Deepseek-chatLm Chat Open AiModel
  7. 7AI AgentAgentModel
  8. 8Load the schema from the local fileRead Write FileService
  9. 9List all tables in a databasePostgresService
  10. 10plot agentAgentModel
  11. 11Extract SQL querySetLogic
  12. 12Extract data from fileExtract From FileService
  13. 13Schema ExtractorPostgresService
  14. 14Edit Fields1SetLogic
  15. 15Check if query existsIfLogic
  16. 16Combine schema data and chat inputSetLogic
  17. 17Add table name to outputSetLogic
  18. 18Combine query result and chat answerMergeLogic
  19. 19Final SQL resultPostgresService
  20. 20No Operation, do nothingNo OpLogic
  21. 21Convert data to JsonConvert To FileService
  22. 22Prepare final outputSetLogic
  23. 23Format query resultsSetLogic
  24. 24Save file locallyRead Write FileService
  25. 25Edit FieldsSetLogic

How it's built

Starts on
Someone opening a chat with it
Steps
25, with 1 branch
Size
Large: read it before trusting it with anything live
Connects to
Postgres
Model
OpenAI
Retrieval
Answers are drawn from documents you supply, not from the model alone

Questions

What does it need to run?

An n8n account, plus your own Postgres account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 25 steps it is large: read it before trusting it with anything live.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 25 steps before you point it at anything that matters.